Start Up • 19
9. If shielded cable is used, connect the cable’s drain wire to an available chassis (earth)
ground at the controller. RKI controllers typically have a ground stud that can be used to
ground the cable’s drain wire.
Start Up
This section describes procedures to start up the sample-draw detector and place the sample-
draw detector into normal operation.
Introducing Incoming Power
1. Complete the installation procedures described earlier in this manual.
2. Verify that the wiring is correct and secure. Refer to the controller operator’s manual for
connections at the controller.
3. Turn on or plug in the power to the controller, then turn on the controller.
4. Verify that the sample-draw detector’s Pilot LED is on.
5. Verify that the controller is on and operating properly. Refer to the controller operator’s
manual.
NOTE:
When first powered up, the sample-draw detector will enter about a one minute
period when the 4-20 mA output is stabilizing and may be above the controller
alarm points or well below zero momentarily. RKI controllers have a one minute
warmup period when the controller does not display any gas reading or give any
alarm indication. The transmitter’s 4-20 mA signal should be stable by the time the
controller’s warmup period is over.
6. Verify that the flowmeter indicates a flow rate of approximately 1.0 SCFH. If necessary,
use the sensor flow control valve to adjust the flow rate. Turn the valve’s knob clockwise
to increase the flow and counterclockwise to decrease the flow.
NOTE:
The following step tests for leaks in the sample line. This test will cause a low flow
condition at the sample-draw detector and a fail condition at the controller. Be sure
to put the controller into its calibration program or disable external alarms before
performing this test.
7. Verify that the incoming sample line is not leaking. To test the sample line, press and hold
the reset switch and plug the open end of the sample line with your thumb. If the
flowmeter ball drops to the bottom of the flowmeter, the incoming sample line is not
leaking.
8. Remove your thumb from the sample line, release the reset switch, and verify the
flowmeter returns to a normal flow rate.
9. Enable alarms or place the controller in normal operation.
